Improved bevolying waist-block



. the purpose cnd su bstantially in the manner described. V

ILLIA T. ADAMS, OF-BA-L'IIMORE, MARYLAND;

Letters 1mm: o; 62,588, dated March 5, 1867;"

IMPRtlVED REVOLVING WAIST-BLGUKa fitlge 5clgrhul nfemt in in tinge ettmthatch nit inking ind m tig-r 5am.

TO ALL WHOM IT MAY CONCERN r 7 Be it known that I, WILLIAM T. ADAMS, ofthe city and county of Baltimore, and State of Maryland, have inventeda. new nndimproved Revolving Waist-Block; and I.do hereby declare thefollowing to be a full, clear,

and exact description of the some, sufiicient to enable one skilled inthe art to which the invention appertsins to make use of it, referencebeing had to the accompanying drawings, which form a port of thisspecification, and' in which- Figure 1 is a perspective view. Figure 2is asection at right angles to the axis of the rotating disk, in whichthe sheave is journslled Figure 3 is a scction'atright angles to theaxis of the sheave.

The sheave, around which'thc sheet-or other rope is passed, isjournulled in a, disk, which is permitted to rotate to keep the axis ofthe sheave zit right'ungles to the direction of the rope. The sheaveisjournalled with-in the rotating dislgiind projects from eech-of itsfaces, so as to deliver n ropefwhich passes rou nd it With outimpediment, both ends in the some direction or near it. It is especiallyadapted for the sheets and other uses in the waist or on the deck'oi' avessel. I

In the drawings, A may represent a. portion of the bulwarksof a vessel,and B is at disk, so arranged as to rotate thereon, not ancctua'l axis,but with anti-friction rollers or balls around its periphery, in a.groove cornmon to the disk and the surrounding deed-work 0 may representthe sheet of one of the courses (or other rope) which passes through theguidedoop D and then around the sheave E, which isjournslled in the disk13,

so the sheet, at the middle of the curve it forms in bending, occupies aportion about axial to the disk As the sheet is hauled in, its directionbecomes somewhat changed as the clew of the sail descends, and as it isslleeted home on the weather side it is at one end of itsrange. I

The object of the invention is to ennblethe shenve alwaysto rotate in aplane as nearly parallel as possible to the line of direction of therope which passes over it, and thereby prevent the wearing away of therope and the friction against the surfaces against which it rubs when itis not fairly presented to the sheave.

The anti-friction balls, which occupy the channel between the disk B andthe dead-work A, may lie-introduced through an opening, G, whichintersects the said channel, the hole being subsequently plugged to keepout extraneous matters. v v

Having described my invention, what I claim therein as new, and desiretosecure by Letters Patent, is

The waist-block sheave E, journalled within the rotating disk B,a.ndprojecting from its ooposite faces, for

W. T. ADAMS. Witnesses:

D. o. Writ, W. J. ADAMS.

